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INA138

Texas Instruments
Part Number INA138
Manufacturer Texas Instruments
Description High Side Measurement Current-Shunt Monitor
Published Oct 18, 2021
Detailed Description Product Folder Order Now Technical Documents Tools & Software Support & Community Reference Design INA138, INA168 ...
Datasheet PDF File INA138 PDF File

INA138
INA138

Overview
Product Folder Order Now Technical Documents Tools & Software Support & Community Reference Design INA138, INA168 SBOS122E – DECEMBER 1999 – REVISED DECEMBER 2017 INA1x8 High-Side Measurement Current Shunt Monitor 1 Features •1 Complete Unipolar High-Side Current Measurement Circuit • Wide Supply and Common-Mode Range • INA138: 2.
7 V to 36 V • INA168: 2.
7 V to 60 V • Independent Supply and Input Common-Mode Voltages • Single Resistor Gain Set • Low Quiescent Current (25 µA Typical) • Wide Temperature Range: –40°C to +125°C • 5-Pin SOT-23 Package 2 Applications • Current Shunt Measurement: – Telephone, Computers • Portable and Battery-Backup Systems • Battery Chargers • Power Management • Cell Phones • Precision Current Source 3 Description The INA138 and INA168 (INA1x8) are high-side, unipolar, current shunt monitors.
Wide input commonmode voltage range, low quiescent current, and tiny SOT-23 packaging enable use in a variety of applications.
Input common-mode and power-supply voltages are independent and can range from 2.
7 V to 36 V for the INA138 and 2.
7 V to 60 V for the INA168.
Quiescent current is only 25 µA, which permits connecting the power supply to either side of the current measurement shunt with minimal error.
The device converts a differential input voltage to a current output.
This current is converted back to a voltage with an external load resistor that sets any gain from 1 to over 100.
Although designed for current shunt measurement, the circuit invites creative applications in measurement and level shifting.
Both the INA138 and INA168 are available in SOT235 and are specified for the –40°C to 125°C temperature range.
Device Information(1) PART NUMBER PACKAGE BODY SIZE (NOM) INA138 INA168 SOT-23 (5) 2.
90 mm × 1.
60 mm (1) For all available packages, see the package option addendum at the end of the datasheet.
VIN+ Up To 60 V Typical Application Circuit RS IS 3 VIN+ 5 kΩ 4 VIN– 5 kΩ Load V+ 5 GND 2 OUT 1 VO = ISRSRL / 5 kΩ ...


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